# Water Pressure Loss Through Piping

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

## formula

$$p_l = \frac { \mu \; \cdot \; l \; \cdot \; {v_w}^2 \; \cdot \; \rho \; \cdot \; SG } { 2d }$$

Where:

$$p_l$$ = pressure loss of water through piping

$$\mu$$ (Greek symbol mu) = friction coefficient

$$l$$ = pipe length

$$v_w$$ = velocity of water through piping

$$\rho$$ (Greek symbol rho) = density of water

$$SG$$ = specific gravity of water

$$d$$ = pipe inner diameter